unchanged. It produces only 1 chain in the /chains subdirectory, which is not what I want either. More interestingly, when I check the CPU tab in the system monitor, of those 8 CPUs/threads (I think these are vCPUs?), only 2 are working on MCMC. I thought it should go as (8 vCPUs) / (2 threads) = 4 chains?

The problem I have is, how many CPUs do I actually have? And also, which command and which line in the .ini file should I modify to achieve my initial goal of 2 chains in total? Or maybe there is something I can do that can further decrease the time needed to finish my first CosmoMC run?

and the num_threads key determines the number of CPUs per chain. Using the lscpu command, I know that I have 8 CPUs, so I use num_threads=4 to maximally utilise the computing power. But, for some reason, it only supports 2 CPUs per chain maximum. That is, on my computer,